Re: Keeping an unused fridge and freezer "fresh" ?
In our travel trailer we just leave the doors standing wide open when not in use.
A word of caution is to somehow block the door so that kids can't get in to play... and suffocate, even little refrigerators and even if you don't have have kids!
Re: Keeping an unused fridge and freezer "fresh" ?
Baking soda or charcoal both work. If it is in an area where there is moisture the baking soda and charcoal need to be changed every few months. I would also advise that you rub the door seals with silicone and maybe a coat of car wax on the outside if it is stored in a garage.
Try to blow out any of the water lines (Ice maker or water through the door) and inject a slight vinegar and water through the lines to clean out deposits. Stop at and resturant and ask for some sanitizer to inject into the lines too. Just about any resturant will squirt some into a zip lock bag for you and you do not need much.
Moisture and mold are your enemies.
Toss a handfull of mothballs under it to keep away the critters too.